graptolite是什么意思_graptolite怎么读_音标'græptəlaɪt

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graptopte是什么意思音标:英 ['græptəlaɪt]美 ['græptəlaɪt]

n. [古生]笔石( 古元脊椎动物, 现存化石 )

n. One of numerous species of slender and depcate
fossils, of the genus Graptoptes and alped genera, found in the
Silurian rocks. They belong to an extinct group (Graptopthina)
supposed to be hydroids.

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